I ran magnum 30% heli in my 1.75 DZ. Motor ran great. I didn't have any problem with it.
You can get it delivered for $21.60 /gal, has to go to a business address though.
22% synthetic, it smoked some, but that didn't really bother me.
That comes out to a pretty reasonable $/flight.
Is Buzz still around??
I figured he had packed it in years ago.
I bailed on him when he wanted me to pull out the element on the glow plug.
I used his stuff occasionally and as I recall it ran well....never tried it on the 170 CDI though.
He had some disagreement with the local shop so they never had any more of it....I didn't want to invest in a lot of it so I went back to CP.
Dave